Question

The pair of proteins having heme core is

• A. hemoglobin and myoglobin
• B. hemerythrin and myoglobin.
• C. hemoglobin and hemocyanin
• D. hemocyanin and hemerythrin.

Answer 1

The Correct Option is A

Hemoglobin and myoglobin are both heme-containing proteins, where the heme group is responsible for oxygen binding. Hemoglobin is found in red blood cells and transports oxygen throughout the body, while myoglobin is found in muscles and stores oxygen. Both proteins have a heme core that plays a critical role in oxygen transport and storage.

• Hemerythrin and hemocyanin are also oxygen-binding proteins, but they do not contain a heme core. Hemerythrin contains an iron-based structure but not the heme group, and hemocyanin contains copper ions instead of iron for oxygen binding.

Thus, the correct answer is (A) hemoglobin and myoglobin.